Question

Several groups of researchers conducted experiments to study how students’ diets affected their performance in school. Researchers asked students to record what they ate every day for a year. The findings suggested that students who ate a higher amount of vegetables as compared to protein tended to have better grades. What can the researchers validly claim based on these findings?
Answer
There may be a correlation between a diet high in vegetables and better grades.
School children should try to eat more vegetables if they want to improve their grades.
Students with higher grades have

Answer 1

have parents who are better educated about diet.
The American diet is deficient in the vitamins and minerals that help with mental processes.

Answer 2

I think it's the first option: "There may be a correlation between vegetable consumption and academic achievement." The other options make assumptions about causal relationships between the variables which can't be drawn on the given info.

Answer 3

if i have to ans among thesse then i ll go gor 1 option but as we know too dat our body use carbohydrate more to produce energy as compare to proteins..

Answer 4

The question is trying to find out if you know about what you can conclude and what you cannot from an experiment. There is no information about the student's parents in this study, or the American diet. 2 may come out of it as a recommendation based on the research, but you are asked to choose what the researchers can validly claim, and that is only option 1. As blues said.